Christmas Island

Sonic was born on a small island called Christmas Island. But his love for adventure called him away and he has visited so many different places on Earth that he doesn't really have a place he considers to be home.

Christmas Island (クリスマス島,Kurisumasu tō?) is the place where Sonic the Hedgehog was born.[1][2] No other information is known or ever given about this island, nor it has ever been referred to in video game appearances.